What is CVE-2026-97636?

CVE-2026-97636 is a medium-severity vulnerability in Apache Software Foundation Airflow Hashicorp Provider, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-24.

How severe is CVE-2026-97636?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Apache Software Foundation Airflow Hashicorp Provider

CVE-2026-97636

Apache Airflow HashiCorp provider: the HashiCorp Vault secrets backend's team-scope guard can be bypassed with a user-controlled key. In a multi-team deployment, a Dag author scoped to one team can supply a Variable key containing a path separator that causes the backend to resolve a secret belonging to a different team, because after the team-scoped lookup misses the backend falls back to a team-agnostic path concatenated from the unvalidated key. The Execution API Variables route accepts a path-shaped key, so this is reachable from ordinary Dag code. Affects multi-team deployments using the HashiCorp Vault secrets backend. Single-team deployments are not affected, as there is no cross-team boundary to cross. This is the same class as CVE-2026-86465, CVE-2026-68870, CVE-2026-68871 and CVE-2026-68872 in the Akeyless, Azure Key Vault, Yandex Lockbox and Amazon secrets backends. Users of apache-airflow-providers-hashicorp are recommended to upgrade to version 4.8.0 or later, which fixes the issue.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-09-24 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.6th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Apache Software Foundation Airflow Hashicorp Provider

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/apache/airflow/pull/70006 (patch)
lists.apache.org/thread/l0fogo9dh5v07vnsxnhoh3c74othkr51 (vendor-advisory)
www.cve.org/CVERecord (related)
www.cve.org/CVERecord (related)
www.cve.org/CVERecord (related)
www.cve.org/CVERecord (related)

Frequently asked questions

What is CVE-2026-97636?: CVE-2026-97636 is a medium-severity vulnerability in Apache Software Foundation Airflow Hashicorp Provider, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-24.
How severe is CVE-2026-97636?: Medium severity. CVSS v3 base score is 6.5 out of 10.